反应详情

温度

0 °C

Crude (2S,3S)-3-cyclohexyl-2-(1,3-dioxoisoindolin-2-yl)-3-hydroxypropanal (3.22 g, 10.7 mmol, calculated according to theoretical yield) was dissolved in anhydrous THF (20 mL). The solution was cooled to 0° C. Acetic acid (5.5 mL, 90 mmol), methylamine solution (33% in EtOH, 5.0 mL, 40.0 mmol) and NaHB(OAc)3 (8.80 g, 40.0 mmol) were added sequentially and in single portions. The ice bath was removed and the mixture was stirred for 2 h at rt. The solvent was stripped and the crude 2-((1S,2R)-1-cyclohexyl-1-hydroxy-3-(methylamino)propan-2-yl)isoindoline-1,3-dione (6.45 g) was used directly in the next step.

1. customThe ice bath was removed